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Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.17 by root, Fri Dec 15 03:53:44 2006 UTC vs.
Revision 1.60 by root, Thu Jul 12 19:36:58 2007 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
3 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
4 Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team 5 * Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team
5 Copyright (C) 1992 Frank Tore Johansen 6 * Copyright (©) 1992,2007 Frank Tore Johansen
6 7 *
7 This program is free software; you can redistribute it and/or modify 8 * Crossfire TRT is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by 9 * it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or 10 * the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version. 11 * (at your option) any later version.
11 12 *
12 This program is distributed in the hope that it will be useful, 13 * This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details. 16 * GNU General Public License for more details.
16 17 *
17 You should have received a copy of the GNU General Public License 18 * You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software 19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 *
20
21 The author can be reached via e-mail to <crossfire@schmorp.de> 21 * The authors can be reached via e-mail to <crossfire@schmorp.de>
22*/ 22 */
23 23
24/** 24/**
25 * \file 25 * \file
26 * Main client/server loops. 26 * Main client/server loops.
27 * 27 *
28 * \date 2003-12-02 28 * \date 2003-12-02
29 * 29 *
30 * loop.c mainly deals with initialization and higher level socket 30 * loop.c mainly deals with initialization and higher level socket
31 * maintenance (checking for lost connections and if data has arrived.) 31 * maintanance (checking for lost connections and if data has arrived.)
32 * The reading of data is handled in ericserver.c
33 */ 32 */
34
35 33
36#include <global.h> 34#include <global.h>
37#include <sproto.h> 35#include <sproto.h>
38#include <sockproto.h> 36#include <sockproto.h>
39 37
45 43
46#include <unistd.h> 44#include <unistd.h>
47#include <arpa/inet.h> 45#include <arpa/inet.h>
48 46
49#include <loader.h> 47#include <loader.h>
50#include <newserver.h>
51 48
52/***************************************************************************** 49#define BG_SCRUB_RATE 4 // how often to send a face in the background
53 * Start of command dispatch area.
54 * The commands here are protocol commands.
55 ****************************************************************************/
56 50
57/* Either keep this near the start or end of the file so it is 51#define MAX_QUEUE_DEPTH 500
58 * at least reasonablye easy to find. 52#define MAX_QUEUE_BACKLOG 3.
59 * There are really 2 commands - those which are sent/received
60 * before player joins, and those happen after the player has joined.
61 * As such, we have function types that might be called, so
62 * we end up having 2 tables.
63 */
64 53
65enum {
66 PF_PLAYER = 0x01, // must have valid player
67 PF_IMMEDIATE = 0x02, // TODO: hack, can be executed immediately
68 PF_PLAYING = 0x04, // must be in playing state
69};
70
71struct pkt_type
72{
73 const char *name;
74 void *cb;
75 int flags;
76
77 bool may_execute (client_socket *ns)
78 {
79 return (!(flags & PF_PLAYER) || ns->pl)
80 && (!(flags & PF_PLAYING) || (ns->pl && ns->pl->state == ST_PLAYING));
81 }
82
83 void execute (client_socket *ns, char *data, int datalen)
84 {
85 //TODO: only one format
86 if (flags & PF_PLAYER)
87 ((void (*)(char *, int, player * ))cb)((char *)data, datalen, ns->pl);
88 else
89 ((void (*)(char *, int, client_socket *))cb)((char *)data, datalen, ns);
90 }
91};
92
93// SocketCommand, PlayingCommand, should not exist with those ugly casts
94#define SC(cb) (void *)static_cast<void (*)(char *, int, client_socket *)>(cb),
95#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER |
96
97/**
98 * Dispatch table for the server.
99 */
100static struct pkt_type packets[] = {
101 {"ncom", PC(NewPlayerCmd) PF_PLAYING },
102 {"command", PC(PlayerCmd) PF_PLAYING },
103
104 {"examine", PC(ExamineCmd) PF_PLAYING | PF_IMMEDIATE },
105 {"apply", PC(ApplyCmd) PF_PLAYING | PF_IMMEDIATE },
106 {"reply", PC(ReplyCmd) PF_IMMEDIATE },
107 {"lookat", PC(LookAt) PF_PLAYING | PF_IMMEDIATE },
108 {"lock", PC(LockItem) PF_PLAYING | PF_IMMEDIATE },
109 {"mark", PC(MarkItem) PF_PLAYING | PF_IMMEDIATE },
110 {"move", PC(MoveCmd) PF_PLAYING | PF_IMMEDIATE },
111 {"ext", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */
112 {"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */
113 {"mapinfo", PC(MapInfoCmd) PF_IMMEDIATE }, /* CF+ */
114
115 {"addme", SC(AddMeCmd) PF_IMMEDIATE },
116 {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */
117 {"requestinfo", SC(RequestInfo) 0 },
118 {"setfacemode", SC(SetFaceMode) PF_IMMEDIATE },
119 {"setsound", SC(SetSound) PF_IMMEDIATE },
120 {"setup", SC(SetUp) PF_IMMEDIATE },
121 {"version", SC(VersionCmd) PF_IMMEDIATE },
122 {"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /*Added: tchize */
123 {"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /*Added: tchize */
124 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
125};
126
127/**
128 * RequestInfo is sort of a meta command. There is some specific
129 * request of information, but we call other functions to provide
130 * that information.
131 */
132void 54void
133RequestInfo (char *buf, int len, client_socket * ns) 55client::reset_state ()
134{ 56{
135 char *params = NULL, *cp; 57 if (!pl)
58 return;
136 59
137 /* No match */ 60 pl->run_on = 0;
138 char bigbuf[MAX_BUF]; 61 pl->fire_on = 0;
139 int slen; 62}
140 63
141 /* Set up replyinfo before we modify any of the buffers - this is used 64void
142 * if we don't find a match. 65client::queue_command (packet_type *handler, char *data, int datalen)
143 */ 66{
144 strcpy (bigbuf, "replyinfo "); 67 tstamp stamp = NOW;
145 slen = strlen (bigbuf);
146 safe_strcat (bigbuf, buf, &slen, MAX_BUF);
147 68
148 /* find the first space, make it null, and update the 69 if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
149 * params pointer.
150 */
151 for (cp = buf; *cp != '\0'; cp++)
152 if (*cp == ' ')
153 { 70 {
154 *cp = '\0'; 71 //TODO: just disconnect here?
155 params = cp + 1; 72 reset_state ();
156 break; 73 send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
157 } 74 }
158
159 if (!strcmp (buf, "image_info"))
160 send_image_info (ns, params);
161 else if (!strcmp (buf, "image_sums"))
162 send_image_sums (ns, params);
163 else if (!strcmp (buf, "skill_info"))
164 send_skill_info (ns, params);
165 else if (!strcmp (buf, "spell_paths"))
166 send_spell_paths (ns, params);
167 else 75 else
168 ns->send_packet (bigbuf, len); 76 {
169} 77 cmd_queue.push_back (command ());
170 78 command &cmd = cmd_queue.back ();
171/** 79 cmd.stamp = stamp;
172 * Handle client input. 80 cmd.handler = handler;
173 * 81 cmd.data = salloc<char> (datalen + 1, data);
174 * HandleClient is actually not named really well - we only get here once 82 cmd.datalen = datalen;
175 * there is input, so we don't do exception or other stuff here.
176 * sock is the output socket information. pl is the player associated
177 * with this socket, null if no player (one of the init_sockets for just
178 * starting a connection)
179 */
180
181void
182HandleClient (client_socket *ns, player *pl)
183{
184 /* Loop through this - maybe we have several complete packets here. */
185 // limit to a few commands only, though, as to not monopolise the server
186 for (int repeat = 16; repeat--;)
187 { 83 }
188 /* If it is a player, and they don't have any speed left, we 84}
189 * return, and will read in the data when they do have time.
190 */
191 if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0)
192 return;
193 85
194 int pkt_len = ns->read_packet (); 86bool
87client::handle_command ()
88{
89 if (!cmd_queue.empty ()
90 && state == ST_PLAYING
91 && pl->ob->speed_left > 0.f)
92 {
93 command &cmd = cmd_queue.front ();
195 94
196 if (pkt_len < 0) 95 if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW)
197 { 96 {
198 LOG (llevError, "read error on player %s\n", &pl->ob->name); 97 reset_state ();
199 /* Caller will take care of cleaning this up */ 98 send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
200 ns->status = Ns_Dead;
201 return;
202 }
203 else if (pkt_len == 0)
204 /* Still dont have a full packet */
205 return;
206
207 /* First, break out beginning word. There are at least
208 * a few commands that do not have any paremeters. If
209 * we get such a command, don't worry about trying
210 * to break it up.
211 */
212 int datalen;
213 char *data = strchr ((char *)ns->inbuf + 2, ' ');
214
215 if (data)
216 {
217 *data++ = 0;
218 datalen = pkt_len - (data - (char *)ns->inbuf);
219 } 99 }
220 else 100 else
221 { 101 execute (cmd.handler, cmd.data, cmd.datalen);
222 data = (char *)ns->inbuf + 2; // better read garbage than segfault
223 datalen = 0;
224 }
225 102
226 ns->inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 103 cmd_queue.pop_front ();
227 104 return true;
228 for (pkt_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
229 if (!strcmp ((char *)ns->inbuf + 2, pkt->name))
230 {
231 if (pkt->may_execute (ns))
232 {
233 pkt->execute (ns, data, datalen);
234 ns->skip_packet (pkt_len);
235 //D//TODO not doing this causes random memory corruption
236 if (pkt->flags & PF_IMMEDIATE)
237 goto next_packet;
238 return;
239 }
240 }
241
242 /* If we get here, we didn't find a valid command. Logging
243 * this might be questionable, because a broken client/malicious
244 * user could certainly send a whole bunch of invalid commands.
245 */
246 LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf + 2);
247 ns->skip_packet (pkt_len);
248 next_packet:
249 ;
250 } 105 }
106 else
107 return false;
251} 108}
252 109
253void 110void
254flush_sockets (void) 111flush_sockets (void)
255{ 112{
256 for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i) 113 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
257 if ((*i)->status != Ns_Dead)
258 (*i)->flush (); 114 (*i)->flush ();
259} 115}
260 116
261/** 117/**
262 * This checks the sockets for input, does the right thing. 118 * This checks the sockets for input, does the right thing.
263 * 119 *
266 * 122 *
267 */ 123 */
268void 124void
269doeric_server (void) 125doeric_server (void)
270{ 126{
271 int i, pollret; 127 //TODO: should not be done here, either
272 fd_set tmp_read; 128 for (unsigned i = 0; i < clients.size (); ++i)
273 struct sockaddr_in addr; 129 {
274 socklen_t addrlen = sizeof (struct sockaddr); 130 client *ns = clients [i];
275 player *pl, *next;
276 int maxfd = 0;
277 131
278#ifdef CS_LOGSTATS 132 ns->tick ();
279 if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) 133 ns->refcnt_chk ();
280 write_cs_stats (); 134 }
281#endif 135}
282 136
283 /* Go through the players. Let the loop set the next pl value, 137void
284 * since we may remove some 138client::tick ()
139{
140 if (!pl || destroyed ())
141 return;
142
143 /* Update the players stats once per tick. More efficient than
144 * sending them whenever they change, and probably just as useful
285 */ 145 */
286 //TODO: must be handled cleanly elsewhere 146 esrv_update_stats (pl);
287 for (pl = first_player; pl; ) 147
148 if (last_weight != -1 && last_weight != WEIGHT (pl->ob))
149 {
150 esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
151 if (last_weight != WEIGHT (pl->ob))
152 LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
153 (unsigned long) last_weight, WEIGHT (pl->ob));
288 { 154 }
289 player *npl = pl->next;
290 155
291 //TODO: must be handled cleanly elsewhere 156 draw_client_map (pl);
292 if (pl->socket->status == Ns_Dead) 157
158 if (update_look)
159 esrv_draw_look (pl);
160
161 if (ixface.empty ())
162 {
163 // regularly send a new face when queue is empty
164 if (bg_scrub && !--bg_scrub && enable_bg_scrub)
165 while (scrub_idx < faces.size () - 1)
166 {
167 ++scrub_idx;
168
169 if (!faces_sent [scrub_idx])
170 {
171 send_face (scrub_idx);
172 flush_fx ();
173
174 bg_scrub = 1; // send up to one face per tick, unless an image was requested
175 break;
176 }
177 }
178
179 rate_avail = max_rate - outputbuffer_len ();
180 }
181 else if (!outq) // only send when bandwidht allows it
182 {
183 int ol = outputbuffer_len ();
184
185 rate_avail = min (max_rate, rate_avail + max_rate);
186 rate_avail -= ol;
187
188 int avail = rate_avail;
189
190 // if we can split images, transfer up to mss-sized packets if possible
191 // but never 768 bytes more.
192 if (fxix) avail += min (768, mss - (ol % mss));
193
194 bg_scrub = BG_SCRUB_RATE;
195
196 while (avail > 0)
293 { 197 {
294 save_player (pl->ob, 0); 198 ixsend &ix = ixface.back ();
295 199
296 if (!QUERY_FLAG (pl->ob, FLAG_REMOVED)) 200 if (facedata *d = face_data (ix.idx, faceset))
297 { 201 {
298 terminate_all_pets (pl->ob); 202 if (fxix)
299 pl->ob->remove (); 203 {
204 // only transfer something if the amount of data transferred
205 // has a healthy relation to the header overhead
206 if (avail <= 40)
207 break;
208
209 // 9 bytes is enough for fx_FFFOOO
210 int chunk = min (min (avail, MAXSOCKBUF - 9), (int)ix.ofs);
211
212 if (chunk <= 0)
213 break;
214
215 ix.ofs -= chunk;
216
217 //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D
218
219 packet sl ("ix");
220
221 sl << ber32 (ix.idx)
222 << ber32 (ix.ofs)
223 << data (d->data.data () + ix.ofs, chunk);
224
225 send_packet (sl);
226 }
227 else
228 {
229 send_image (ix.idx);
230 ix.ofs = 0;
231 }
300 } 232 }
233 else
234 ix.ofs = 0;
301 235
302 leave (pl, 1); 236 int consumed = outputbuffer_len () - ol;
303 final_free_player (pl); 237
238 avail -= consumed;
239 rate_avail -= consumed;
240
241 ol = outputbuffer_len ();
242
243 if (!ix.ofs)
244 {
245 ixface.pop_back ();
246
247 if (ixface.empty ())
248 break;
249 }
304 } 250 }
305
306 pl = npl;
307 }
308
309 FD_ZERO (&tmp_read);
310
311 for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); )
312 { 251 }
313 client_socket *s = *i;
314
315 if (s->status == Ns_Dead)
316 {
317 client_sockets.erase (i);
318 delete s;
319 }
320 else
321 {
322 if (s->fd > maxfd) maxfd = s->fd;
323
324 FD_SET (s->fd, &tmp_read);
325
326 ++i;
327 }
328 }
329
330 struct timeval timeout;
331
332 timeout.tv_sec = 0;
333 timeout.tv_usec = 0;
334
335 pollret = select (maxfd + 1,
336 &tmp_read, 0, 0,
337 &timeout);
338
339 if (pollret == -1)
340 {
341 LOG (llevError, "select failed: %s\n", strerror (errno));
342 return;
343 }
344
345 /* We need to do some of the processing below regardless */
346
347 /* Check for any input on the sockets */
348 for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i)
349 {
350 client_socket *s = *i;
351 player *pl = s->pl;
352
353 //TODO: disassociate handleclient from socket readin
354 if (s->inbuf_len || FD_ISSET (s->fd, &tmp_read))
355 HandleClient (s, pl);
356
357 //TODO: should not be done here, either
358 if (s->status != Ns_Dead && pl)
359 {
360 /* Update the players stats once per tick. More efficient than
361 * sending them whenever they change, and probably just as useful
362 */
363 esrv_update_stats (pl);
364 if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
365 {
366 esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
367 if (pl->last_weight != WEIGHT (pl->ob))
368 LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
369 (unsigned long) pl->last_weight, WEIGHT (pl->ob));
370 }
371
372 /* draw_client_map does sanity checking that map is
373 * valid, so don't do it here.
374 */
375 draw_client_map (pl->ob);
376 if (s->update_look)
377 esrv_draw_look (pl->ob);
378 }
379 }
380} 252}
381 253

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